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agasfer [191]
3 years ago
8

Geologists in Antarctica find an average of 7 meteorite fragments in every 500 tons of gravel they sift

Mathematics
1 answer:
pav-90 [236]3 years ago
6 0

Answer:

Step-by-step explanation:

Explanation: 7 fragments =500 tons of gravel. 100 fragments = 5007⋅100=7142.86 tons of gravel.

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A room can be cleaned in 2 hours if rob and Harry work together. Ron could clean it in 3 hours. How long can harry clean it?
tresset_1 [31]

Answer:

6 hours

Step-by-step explanation:

Let the total work be X

Combined speed: X/2

Ron's speed: X/3

Harry's speed: S

X/2 = X/3 + S

S = X/2 - X/3 = (3X - 2X)/6 = X/6

Harry's speed is X/6, so he'll take 6 hours

6 0
3 years ago
Help me out please<br> and i need a step by step explanation
AVprozaik [17]

Answer: 1 + (-1) + (-4) = -4

Step-by-step explanation:

By counting how many chips there are, you can get the following:

1 positive chip + 1 negative chip + 4 negative chips, which is

+1                      +          -1              + 4 x -1

= 1                     -1                           -4

= -4

4 0
3 years ago
A car requires 25 litres of petrol for covering a distance of 350 km how much petrol will be required by the car to cover a dist
jasenka [17]
75 litres of petrol would be required
4 0
3 years ago
Read 2 more answers
⚠️⚠️⚠️⚠️HELP ME PLLEEAASEE⚠️⚠️⚠️⚠️⚠️
shusha [124]

Answer:

240 feet

Step-by-step explanation:

i multiplied 6

inches and 40 feet.

3 0
3 years ago
Irving can I remember the correct order of the five digits on his ID number he does remember that the ID number contains the dig
Cloud [144]

Answer: \frac{27}{125}

Step-by-step explanation:

Here the total numbers are 1,  4,  3,  7,  6

Since the total number of possible arrangement = 5\times 5 \times5 \times 5 \times 5=5^5

The total number of the odd numbers in the given numbers = 3

Thus the possible arrangement that the first three digits will be odd numbers = 3\times 3\times 3\times 5\times 5=3^3\times 5^2

Thus, the probability that the first three digits of Irvings ID number will be odd numbers = the possible arrangement that the first three digits will be odd numbers / total possible arrangement =  \frac{3^3\times 5^2}{5^5} = \frac{3^2}{5^{5-2}}

= \frac{3^3}{5^3} = \frac{27}{125}

5 0
4 years ago
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